Patents by Inventor John Ledford
John Ledford has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20250021953Abstract: A real-time system and method for determining whether to invoke a fraud alert notification to a bank concerning an account holder or an item issuer following an interim determination that the account holder or item issuer has participated in a fraudulent transaction. An interim determination is updated based in part on bank transaction data received following the interim determination.Type: ApplicationFiled: October 1, 2024Publication date: January 16, 2025Applicant: VALID SYSTEMS, LLCInventors: Dyron Clower, John Templer, La Shonna Sharp, Aaron Calipari, Michael Ring, Michael Serrette, Nickolas Ledford, Lawrence Dugger, Rodney Drake, Diana Hayes
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Patent number: 12097941Abstract: The portable pedal system for kayaks and other watercraft is a propulsion device. The portable pedal system for kayaks and other watercraft removably attaches to a vessel. The portable pedal system for kayaks and other watercraft is manually powered. The portable pedal system for kayaks and other watercraft comprises a belt drive, a transmission structure, and a vessel. The belt drive and the transmission structure removably attach to the vessel. The belt drive attaches to the transmission structure. A client manually powers the rotation of the belt drive. The rotation of the belt drive rotates the transmission structure which propels the vessel through the water.Type: GrantFiled: April 8, 2022Date of Patent: September 24, 2024Inventors: Henry Ledford, Michael D Ledford, John Ledford Kirkpatrick
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Patent number: 10710344Abstract: A membrane system, having a waterproof woven polymer reinforcing scrim disposed between two layers of a thermoplastic polymer membrane; and an optional layer of concrete activated adhesive applied on top of a center portion, but not to the edges of the thermoplastic polymer membrane so that the edges of adjacent membranes can be thermally welded together to form a waterproof seal for use in blindside waterproofing or roofing applications.Type: GrantFiled: November 26, 2019Date of Patent: July 14, 2020Assignee: CARLISLE CONSTRUCTION MATERIALS, LLCInventors: John Ledford, Brian Gish, Ross Vinson, Tony Vitale, Peter DiGiovanni, Justin Tepera, Steve Velten
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Publication number: 20200171805Abstract: A membrane system, having a waterproof woven polymer reinforcing scrim disposed between two layers of a thermoplastic polymer membrane; and an optional layer of concrete activated adhesive applied on top of a center portion, but not to the edges of the thermoplastic polymer membrane so that the edges of adjacent membranes can be thermally welded together to form a waterproof seal for use in blindside waterproofing or roofing applications.Type: ApplicationFiled: November 26, 2019Publication date: June 4, 2020Applicant: CARLISLE CONSTRUCTION MATERIALS, LLCInventors: John LEDFORD, Brian GISH, Ross VINSON, Tony VITALE, Peter DIGIOVANNI, Justin TEPERA, Steve VELTEN
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Publication number: 20070249491Abstract: A catalyst for production of unsaturated aldehydes, such as methacrolein, by gas phase catalytic oxidation of olefins, such as isobutylene, contains oxides of molybdenum, bismuth, iron, cesium and, optionally, other metals. The catalyst has a certain relative amount ratio of cesium to bismuth, a certain relative amount ratio of iron to bismuth and a certain relative amount ratio of bismuth, iron, cesium and certain other metals to molybdenum and, optionally, tungsten. For a catalyst of the formula: Mo12BiaWbFecCodNieSbfCsgMghZniPjOx wherein a is 0.1 to 1.5, b is 0 to 4, c is 0.2 to 5.0, d is 0 to 9, e is 0 to 9, f is 0 to 2.0, g is from 0.4 to 1.5, h is 0 to 1.5, i is 0 to 2.0, j is 0 to 0.5 and x is determined by the valences of the other components, c:g=3.3-5.0, c:a=2.0-6.0 and (3a+3c+2d+2e+g+2h+2i)/(2×12+2b)=0.95-1.10.Type: ApplicationFiled: May 24, 2007Publication date: October 25, 2007Inventors: Wugeng Liang, Scott Stevenson, James Kauffman, John Ledford, Joseph Linzer
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Publication number: 20070238904Abstract: A catalyst for production of unsaturated aldehydes, such as methacrolein, by gas phase catalytic oxidation of olefins, such as isobutylene, contains oxides of molybdenum, bismuth, iron, cesium and, optionally, other metals. The catalyst has a certain relative amount ratio of cesium to bismuth, a certain relative amount ratio of iron to bismuth and a certain relative amount ratio of bismuth, iron, cesium and certain other metals to molybdenum and, optionally, tungsten. For a catalyst of the formula: Mo12BiaWbFecCodNieSbfCsgMghZniPjOx wherein a is 0.1 to 1.5, b is 0 to 4, c is 0.2 to 5.0, d is 0 to 9, e is 0 to 9, f is 0 to 2.0, g is from 0.4 to 1.5, h is 0 to 1.5, i is 0 to 2.0, j is 0 to 0.5 and x is determined by the valences of the other components, c:g=3.3-5.0, c:a=2.0-6.0 and (3a+3c+2d+2e+g+2h+2i)/(2×12+2b)=0.95-1.10.Type: ApplicationFiled: May 24, 2007Publication date: October 11, 2007Inventors: Wugeng Liang, Scott Stevenson, James Kauffman, John Ledford, Joseph Linzer
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Publication number: 20070066856Abstract: Disclosed is a process for the preparation of alkylene glycols from the corresponding alkylene oxide, such as ethylene glycol from ethylene oxide, in the presence of water, a catalyst and, optionally, carbon dioxide. The catalyst is a SALEN-type compound which contains an amino group and an oxy or hydroxy group connected by a hydrocarbon, such as an alkyl or an alkylaryl. The SALEN-type compounds may be Schiff bases, i.e., a condensate product of a primary amine with an aldehyde, ketone or an alcohol. The SALEN-type compound may be a mono or bis compound and may be complexed with a Group 4-14 metal, such as aluminum, tin, vanadium, chromium, manganese, iron, cobalt or platinum.Type: ApplicationFiled: October 2, 2006Publication date: March 22, 2007Inventors: Jaap Van Hal, John Ledford, Xiankuan Zhang
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Publication number: 20070003764Abstract: A nonblocking coated elastomeric film comprises an elastomeric polymer film layer and a nonblocking solvent-based coating layer. The coating layer comprises a nonblocking coating component. The coating layer may be applied to one or both surfaces of the elastomeric polymer film layer.Type: ApplicationFiled: June 1, 2006Publication date: January 4, 2007Inventors: Iyad Muslet, Robert Tomany, James Merrill, Max Hufferd, David Bland, John Ledford, Arrigo Jezzi
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Patent number: 7084216Abstract: The present invention relates to a process for homopolymerization of ethylene or copolymerization of ethylene with alpha-olefins by contacting ethylene or ethylene and alpha-olefin with a catalyst composition comprising: (a) a solid catalyst precursor comprising at least one vanadium compound, at least one magnesium compound and a polymeric material or a solid catalyst precursor comprising at least one vanadium compound, at least one further transition metal compound and/or at least one alcohol, at least one magnesium compound and a polymeric material; and (b) a cocatalyst comprising an aluminum compound.Type: GrantFiled: January 30, 2002Date of Patent: August 1, 2006Assignee: Saudi Basic Industries CorporationInventors: Akhlaq A. Moman, Khalid Al-Bahily, Atieh Abu-Raqabah, John Ledford, Orass M. Hamed, Raju Raghavan, Sameh Rizkallah
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Publication number: 20060122437Abstract: Disclosed is a process for the preparation of alkylene glycols from the corresponding alkylene oxide, such as ethylene glycol from ethylene oxide, in the presence of water, a catalyst and, optionally, carbon dioxide. The catalyst contains an amphoteric compound, such as such as (ethylenedinitrilo) tetraacetic acid (EDTA). These befunctional compounds have both acid and base moieties. Preferably, a compound useful in the present invention forms a buffered solution in water, i.e., the acid and base moieties do not completely disassociate. The pH of the buffered solution should be 2-10, preferably 5-10, more preferably 4-9. A compound useful in the present invention is preferably organic with the base moiety and the acid moiety being separated by one to four carbon atoms.Type: ApplicationFiled: December 7, 2004Publication date: June 8, 2006Inventors: John Ledford, Jaap Van Hal, Xiankuan Zhang
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Publication number: 20060069293Abstract: Disclosed is a process for the preparation of alkylene glycols from the corresponding alkylene oxide, such as ethylene glycol from ethylene oxide, in the presence of water, a catalyst and, optionally, carbon dioxide. The catalyst is a SALEN-type compound which contains an amino group and an oxy or hydroxy group connected by a hydrocarbon, such as an alkyl or an alkylaryl. The SALEN-type compounds may be Schiff bases, i.e., a condensate product of a primary amine with an aldehyde, ketone or an alcohol. The SALEN-type compound may be a mono or bis compound and may be complexed with a Group 4-14 metal, such as aluminum, tin, vanadium, chromium, manganese, iron, cobalt or platinum.Type: ApplicationFiled: September 30, 2004Publication date: March 30, 2006Inventors: Jaap Van Hal, John Ledford, Xiankuan Zhang
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Publication number: 20060041173Abstract: Disclosed is a process for the preparation of alkylene glycols from the corresponding alkylene oxide, such as ethylene glycol from ethylene oxide, in the presence of water, a catalyst and, optionally, carbon dioxide. The catalyst contains amines which are weak bases, specifically having pKa of at least 5.5, preferably 8 to 11. The amines may be primary, secondary, tertiary or a blend thereof or may be a compound having a structural combination of primary, secondary and/or tertiary amines.Type: ApplicationFiled: August 23, 2004Publication date: February 23, 2006Inventors: John Ledford, Jaap Van Hal, Xiankuan Zhang
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Patent number: 7001862Abstract: The present invention relates to a catalyst composition for polymerization of olefins comprising: (a) a solid catalyst pre cursor comprising at least one vanadium compound, at least one magnesium compound and a polymeric material or a solid catalyst precursor comprising at least one vanadium compound, at least one further transition metal compound and/or at least one alcohol, at least one magnesium compound and a polymeric material; and (b) a cocatalyst comprising at least one aluminum compound; and to a method for preparing a catalyst composition according to the present invention, comprising the steps of: (a) combining the components of the solid catalyst precursor; and (b) activating the catalyst precursor with aluminum compound.Type: GrantFiled: January 30, 2002Date of Patent: February 21, 2006Assignee: Saudi Basic Industries CorporationInventors: Akhlaq A. Moman, Khalid Al-Bahily, Atieh Abu-Raqabah, John Ledford, Orass M. Hamed
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Publication number: 20050159621Abstract: A catalyst for production of unsaturated aldehydes, such as methacrolein, by gas phase catalytic oxidation of olefins, such as isobutylene, contains oxides of molybdenum, bismuth, iron, cesium and, optionally, other metals. The catalyst has a certain relative amount ratio of cesium to bismuth, a certain relative amount ratio of iron to bismuth and a certain relative amount ratio of bismuth, iron, cesium and certain other metals to molybdenum and, optionally, tungsten. For a catalyst of the formula: Mo12BiaWbFecCodNieSbfCsgMghZniPjOx wherein a is 0.1 to 1.5, b is 0 to 4, c is 0.2 to 5.0, d is 0 to 9, e is 0 to 9, f is 0 to 2.0, g is from 0.4 to 1.5, h is 0 to 1.5, i is 0 to 2.0, j is 0 to 0.5 and x is determined by the valences of the other components, c:g=3.3-5.0, c:a=2.0-6.0 and (3a+3c+2d+2e+g+2h+2i)/(2×12+2b)=0.95-1.10.Type: ApplicationFiled: March 14, 2005Publication date: July 21, 2005Inventors: Wugeng Liang, Scott Stevenson, James Kauffman, John Ledford, Joseph Linzer
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Publication number: 20050137422Abstract: A one-step vapor phase oxidation process produces an unsaturated carboxylic acid, such as acrylic acid or methacrylic acid, from an alkane, such as propane or isobutane, with a mixed metal oxide catalyst and an excess of alkane relative to oxygen. The unreacted alkane and the byproduct alkene are recycled to the reaction zone without separation. Overall yield and productivity of the unsaturated carboxylic improves for such a process. An analogous method for the preparation of unsaturated nitrites is also disclosed.Type: ApplicationFiled: December 19, 2003Publication date: June 23, 2005Inventors: Paulette Hazin, Frederick Galloway, John Ledford, Andy Nuyen
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Publication number: 20050101749Abstract: The present invention relates to a process for homopolymerization of ethylene or copolymerization of ethylene with alpha-olefins by contacting ethylene or ethylene and alpha-olefin with a catalyst composition comprising: (a) a solid catalyst precursor comprising at least one vanadium compound, at least one magnesium compound and a polymeric material or a solid catalyst precursor comprising at least one vanadium compound, at least one further transition metal compound and/or at least one alcohol, at least one magnesium compound and a polymeric material; and (b) a cocatalyst comprising an aluminum compound.Type: ApplicationFiled: January 30, 2002Publication date: May 12, 2005Inventors: Akhlaq Moman, Khalid Al-Bahily, Atieh Abu-Raqabah, John Ledford, Orass Hamed, Raju Raghavan, Sameh Rizkallah
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Patent number: 6847515Abstract: Power supply systems and methods can enable an electromagnetic device, such as an electrical contactor, to ride-through both voltage sags and dropouts. In an illustrative embodiment, a rectifier is used to generate a DC input voltage from an AC supply voltage. An interface circuit supplies the DC input voltage to an electrical contactor to provide the necessary power for operating the contactor. In general, an electrical contactor that is intended to operate from an AC voltage will operate equally well from a lower magnitude DC voltage. The interface circuit uses this difference in magnitudes between the AC voltage source and an operationally equivalent DC voltage source to maintain the DC input voltage at a desired level even if the AC voltage source sags below its normal operating level. In addition, an energy storage device may be used to store at least some of the DC input voltage.Type: GrantFiled: April 29, 1999Date of Patent: January 25, 2005Assignee: North Carolina State UniversityInventors: Arthur Kelley, John Ledford, Luca Vassalli, John Cavaroc
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Patent number: 6800581Abstract: The present invention relates to a catalyst composition for homopolymerization or copolymerization of olefins comprising: (a) a solid catalyst precursor comprising a transition metal compound of group IVB, VB, or VIB of the periodic table, a magnesium compound and aliphatic polyketone particles; and (b) a cocatalyst comprising an aluminum alkyl, an aluminoxane or mixtures thereof; and a process for homopolymerisation or copolymerisation of olefins.Type: GrantFiled: August 30, 2002Date of Patent: October 5, 2004Assignee: Sabic Basic Industries CorporationInventors: John Ledford, Mansour I. Taftaf, Syriac Palackal, Atieh Abu Raqabah, Akhlaq A. Moman, Orass M. Hamed, Navin Nallaveerapan
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Publication number: 20040106513Abstract: The present invention relates to a catalyst composition for polymerization of olefins comprising: (a) a solid catalyst pre cursor comprising at least one vanadium compound, at least one magnesium compound and a polymeric material or a solid catalyst precursor comprising at least one vanadium compound, at least one further transition metal compound and/or at least one alcohol, at least one magnesium compound and a polymeric material; and (b) a cocatalyst comprising at least one aluminum compound; and to a method for preparing a catalyst composition according to the present invention, comprising the steps of: (a) combining the components of the solid catalyst precursor; and (b) activating the catalyst precursor with aluminum compound.Type: ApplicationFiled: January 8, 2004Publication date: June 3, 2004Inventors: Akhlaq A. Moman, Khalid Al-Bahily, Atieh Abu-Raqabah, John Ledford, Orass M Hamed
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Publication number: 20030073569Abstract: The present invention relates to a catalyst composition for homopolymerization or copolymerization of olefins comprising: (a) a solid catalyst precursor comprising a transition metal compound of group IVB, VB, or VIB of the periodic table, a magnesium compound and aliphatic polyketone particles; and (b) a cocatalyst comprising an aluminum alkyl, an aluminoxane or mixtures thereof; and a process for homopolymerisation or copolymerisation of olefins.Type: ApplicationFiled: August 30, 2002Publication date: April 17, 2003Inventors: John Ledford, Mansour I. Taftaf, Syriac Palackal, Atieh Abu Raqabah, Akhlaq A. Moman, Orass M. Hamed, Navin Nallaveerapan